81 x 9 = 801. What must you do to make the this equation true?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

I drive at an average speed of 30 miles per hour to the railroad station each morning and catch my train. On a particular morning, there was a lot of traffic and at the halfway point, I had averaged only 15 miles per hour. How fast must I drive for the rest of the way to catch my train?

Find the missing number in the series below

13 -21 34 -55 ? -144

What country can make you shiver?

What makes this number unique: 8,549,176,320?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

Which famous Hollywood movie name is hidden in the below rebus?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)